PDF(Pubmed)
Abstract：
In Mexico, there is a deficit in the production of pine resin, because it relies on natural forests only. Therefore, it is necessary to select provenances and phenotypes of potential species such as P. oocarpa. The objective was to determine the difference between provenances and the variation in resin components and quality, as well as the effect of geographic and climatic factors. Resin from five provenances was collected from southern Mexico. The percentage of rosin, turpentine and water was obtained, as well as the acidity and saponification index. P. oocarpa resin had 80.94% rosin, 7.7% turpentine and 11.49% water. The saponification and acidity index was 125.47 and 117.49 mg KOH.g-1, respectively. All variables showed differences (p ≤ 0.0001) between provenances. The provenance contributed between 6.44 and 11.71% to the total variance, the error contributed between 88.29 and 93.56%. Geographic and climatic variables only had an effect on the percentage of turpentine; the correlation was negative with altitude and longitude, but positive with temperature and precipitation. The results allow defining seed collection sites for resin plantations and orienting the selection for a P. oocarpa improvement program.
摘要：
在墨西哥,松脂的生产出现了赤字，因为它只依赖天然森林。因此,有必要选择潜在物种的种源和表型，例如P。目的是确定来源之间的差异以及树脂成分和质量的变化，以及地理和气候因素的影响。从墨西哥南部收集了来自五个产地的树脂。松香的百分比，获得松节油和水，以及酸度和皂化指数。P。Oocarpa树脂具有80.94%的松香，7.7%松节油和11.49%水。皂化和酸度指数为125.47和117.49mgKOH。分别为g-1。所有变量均显示出源之间的差异（p≤0.0001）。来源对总方差的贡献在6.44到11.71%之间，误差在88.29和93.56%之间。地理和气候变量仅对松节油的百分比有影响；与海拔和经度呈负相关，但与温度和降水呈正相关。结果可以定义树脂种植园的种子收集地点，并确定P.oocarpa改良计划的选择方向。
